package model;

import java.util.Collection;
import java.util.Date;

public interface LectureService extends Service
{
	public void addNewLesson( Student s, String title, String content, Date date, int income );
	public void requestAllLessons();
	public void deleteLesson(int id);
	public void deleteLessons(int [] ids);
	public void updateLesson(int id, Student s, String title, String content, Date date, int income );
	
	public void addLectureServiceObserver(LectureServiceListener l);
	public void removeLectureServiceObserver(LectureServiceListener l);
}
